Alkaline Fuel Cell for Electric Aircraft Patent Landscape
Alkaline Fuel Cell for Electric Aircraft Patent Landscape in 2026
The patent space for alkaline fuel cells in electric aircraft is nascent and highly concentrated, with just four patent families on record and the top five filers accounting for the entirety of activity among the largest filers. Deutsches Zentrum für Luft- und Raumfahrt (DLR) holds the leading position by patent records, while GE Aviation Systems is the only other significant challenger, and filing activity has been sporadic across the decade reviewed.
DLR leads a highly concentrated, embryonic field
Deutsches Zentrum für Luft- und Raumfahrt (DLR) ranks first by patent records, followed by GE Aviation Systems, Stralis Holdings, and Hamilton Sundstrand — a field of only four active filers.
The top five filers account for 100% of the combined output of the hundred largest filers, confirming extreme concentration with no meaningful second tier. The gap between the leader and all others is pronounced: DLR holds 5 patent records versus 4 for GE Aviation Systems, with the remaining two applicants at 1 each.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 5 | |
| 2 | GE Aviation Systems Limited | 4 | |
| 3 | Stralis Holdings Pty Ltd | 1 | |
| 4 | Hamilton Sundstrand Corporation | 1 |
DLR’s lead reflects a research-institution posture focused on fuel-cell and propulsion integration, while GE Aviation Systems’ position is more application-oriented toward aircraft equipment. The narrow field means any new entrant with even a small filing program could alter the competitive structure materially.
Patents filed in the most recent 18–24 months are subject to publication lag and may be under-represented in the current dataset; the true recent activity level is likely higher than the figures suggest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Sporadic filing activity with fuel-cell hardware dominating the technology mix
Two charts capture the temporal and technological character of this space: an annual filing trend that reveals episodic rather than sustained invention, and a technology-class breakdown that shows where claims are concentrated.
Annual filing trend
Filings peaked modestly in 2017 with 2 records, then went dormant from 2018 through 2021, with single records appearing in 2022 and 2025. The pattern reflects exploratory rather than systematic R&D investment. Activity in 2024–2026 should be treated as incomplete due to publication lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) dominates with 11 patent records, well ahead of B64D (aircraft equipment) at 6 and B60K (vehicle propulsion and drive) at 3. Gas-turbine plants (F02C) and power supply systems (H02J) each appear just once, indicating that core electrochemical hardware is the primary focus and system-integration branches remain sparse.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Power system for more electric aircraft
Systems and methods for providing power to one or more loads on an aircraft are provided. A power system for an aircraft can include a first fuel cell configured to provide base power to one or more loads on the aircraft. The power system can further include a second fuel cell configured to provide peak power to the one or more loads on the aircraft. The… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Power system for more electric aircraft | 44 |
| 2 | Power system for more electric aircraft | 36 |
| 3 | Hydrogen energy conversion system | 11 |
| 4 | Power system for more electric aircraft | 4 |
| 5 | Apparatus and method of generating mechanical and … | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
The field’s small scale and uneven history shape the risk-return calculus for new entrants and incumbents alike. Four structural observations follow.
Pre-commercial, embryonic stage
With only 4 patent families on record and filing activity appearing in just 2 of the last 10 years, this topic has not yet entered a growth phase. The lifecycle evidence does not support a defined stage label, confirming the field is at the frontier of early exploration rather than scaling. Engineers entering now face low prior-art density but also limited proven technical pathways to build on.
Early-stage100% share held by four filers — no crowded zones
The top five filers account for all activity among the hundred largest filers, yet the absolute volumes are so small that no single actor has established a blocking position across the full application space. The leading applicant, DLR, holds 5 patent records; GE Aviation Systems holds 4. This leaves system-level integration, power management, and balance-of-plant claims largely unclaimed.
High concentrationNo co-filing activity detected
Evidence shows no co-applicant relationships in the current corpus. The absence of collaborative filings is consistent with the field’s embryonic status — organizations are apparently conducting independent exploratory work rather than forming consortia. As the technology matures, co-development agreements (particularly between aerospace OEMs and fuel-cell specialists) would be a signal of escalating commitment.
No collaboration detectedUS primary, European rights partially secured
The United States leads with 4 patent records, followed by Europe (EPO), the United Kingdom, Germany, Austria (AT), and WIPO (PCT) each with 1–2 records. The PCT filing suggests at least one applicant is seeking broad international coverage. For a new entrant, filing in the US and through PCT would be the minimum viable jurisdictional strategy given current precedent.
US-led, EU partialGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
Co-filing pairs, ranked by the number of jointly-filed patent families.
DLR and GE Aviation Systems define the current frontier
The two leading filers approach the problem from complementary angles — one as a national aerospace research institute, the other as a commercial aviation systems supplier — and together account for the majority of patent records in scope.
Deutsches Zentrum für Luft- und Raumfahrt (DLR)
DLR leads with 5 patent records and concentrates its claims in H01M 8 (fuel cells) and B60K 6 (vehicle propulsion and drive integration), reflecting a system-level research posture that connects electrochemical hardware to aircraft propulsion. As a publicly funded aerospace R&D center, DLR’s filings tend to establish foundational technical positions rather than product-specific claims, making its patents important prior art for any subsequent commercial development.
patent records: 5GE Aviation Systems
GE Aviation Systems holds 4 patent records, with its technology focus spanning B64D 41 and B64D 27 (aircraft equipment) alongside H01M 8 (fuel cells), indicating a more application-specific orientation toward aircraft-level integration of fuel-cell power. Hamilton Sundstrand, a new entrant per momentum data, has filed 1 patent record emphasizing aircraft equipment (B64D 15) and gas-turbine plant integration (F02C 3, F02C 6), signaling early interest in hybrid propulsion architectures.
patent records: 4| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Hamilton Sundstrand Corporation | 1 | ▲ new entrant |
Under-served branches in gas-turbine integration and power grid systems
Two IPC classes appear at the periphery of the current corpus with only a single patent record each. These are observations of relative sparsity; their value as entry points depends on technical fit and business strategy.
F02C · Gas-turbine plant integration
Only 1 patent record is classified under F02C (gas-turbine plants) in this corpus, filed by Hamilton Sundstrand. Hybrid architectures combining alkaline fuel cells with turbine-based auxiliary power or propulsion remain technically plausible for regional aircraft where range and power density demand a combined approach. The sparsity of claims here suggests the intersection of alkaline fuel-cell chemistry and turbine integration is not yet systematically explored; an entrant with gas-turbine design capability could establish an early position.
Search this in Eureka →H02J · Power supply and grid systems
H02J (power supply circuits and grid systems) appears just once in the corpus, indicating that power conditioning, distribution architecture, and energy management between alkaline fuel cells and aircraft electrical loads are largely unclaimed territory. As electric aircraft architectures become more complex — with multiple energy sources and high-voltage DC buses — power management IP is likely to grow in strategic value. Engineers with expertise in power electronics for aviation could find this branch accessible and technically relevant.
Search this in Eureka →How leading filers differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 8 · Batteries, cells & fuel cells | B64D 41 · Aircraft equipment | B60K 6 · Vehicle propulsion & drive | B64D 27 · Aircraft equipment | H01M 16 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| GE Aviation Systems Limited | Strong · 4 | Strong · 4 | Absent | Moderate · 2 | Moderate · 2 |
| Deutsches Zentrum für Luft- und Raumfahrt (DLR) | Strong · 5 | Absent | Strong · 3 | Absent | Absent |
| Stralis Holdings Pty Ltd | Strong · 1 | Absent | Absent | Absent | Absent |
| Hamilton Sundstrand Corporation | Strong · 1 | Absent | Absent | Absent | Absent |
Frequently asked questions
The current evidence covers 4 patent families in scope. This is a very small corpus, consistent with the early-stage, pre-commercial nature of the technology.
Deutsches Zentrum für Luft- und Raumfahrt (DLR), the German aerospace research center, leads with 5 patent records, ahead of GE Aviation Systems with 4 patent records.
The United States leads with 4 patent records. Europe (EPO) and the United Kingdom each have 2 records, with Germany, Austria, and WIPO (PCT) each appearing once, indicating partial but not comprehensive international coverage by the current filers.
No co-applicant relationships are detected in the current evidence. All filings to date appear to be independent organizational efforts, with no consortium or joint-development patents on record.
The most-cited works include documents titled ‘Power system for more electric aircraft’ (cited 44 and 36 times respectively) and ‘Hydrogen energy conversion system’ (cited 11 times), suggesting that power architecture for electric aircraft is the most technically foundational prior art in the adjacent literature.
F02C (gas-turbine plant integration) and H02J (power supply and grid systems) each have only 1 patent record, representing the sparsest adjacent branches. Power management and hybrid turbine-fuel-cell architectures are technically plausible entry areas with very limited existing claims.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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